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Overview
| Topology | Flyback Converter |
| Input voltage | 85-440 V |
| Output 1 | 24 V / 0.3 A |
| Output 2 | 5 V / 0.4 A |
| IC revision | B |
Description
This offline flyback reference design uses the UCC28722 controller to generate 2 isolated outputs (5 V at 400 mA, 24 V at 300 mA) from an AC input (85 VAC - 480 VAC). The UCC28722 output drive interfaces to a bipolar transistor power switch, enabling a more efficient design than a typical design. The valley-switching technique reduces switching losses and keeps the efficiency high. The controller provides constant-voltage and constant-current regulation without the use of an optical-coupler.
Features
180-VAC - 264-VAC input to 3 isolated outputsPrimary-side regulation eleminates the need for an optical-couplerValley-switching operation keeps the efficiency highDynamic BJT drive enables lower cost converter design
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | IR (A) | ISAT (A) | RDC max. (Ω) | fres (MHz) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 768772221 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-TI HV Radial Leaded Wire Wound Inductor (High Voltage) | 220 | 0.9 | 1.3 | 0.6 | 3.7 | THT | ||
| 750317104 | SPEC | – | – | Active i| Production is active. Expected lifetime: >10 years. | Flyback Transformer | – | – | – | – | – | – |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | IR (A) | ISAT (A) | RDC max. (Ω) | fres (MHz) | Mount | Samples |
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